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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\DataTable\Renderer;
use Piwik\Common;
use Piwik\DataTable\Renderer;
use Piwik\DataTable;
use Piwik\ProxyHttp;
/**
* JSON export.
* Works with recursive DataTable (when a row can be associated with a subDataTable).
*
*/
class Json extends Renderer
{
/**
* Computes the dataTable output and returns the string/binary
*
* @return string
*/
public function render()
{
$this->renderHeader();
return $this->renderTable($this->table);
}
/**
* Computes the exception output and returns the string/binary
*
* @return string
*/
function renderException()
{
$this->renderHeader();
$exceptionMessage = $this->getExceptionMessage();
$exceptionMessage = str_replace(array("\r\n", "\n"), "", $exceptionMessage);
$result = json_encode(array('result' => 'error', 'message' => $exceptionMessage));
return $this->jsonpWrap($result);
}
/**
* Computes the output for the given data table
*
* @param DataTable $table
* @return string
*/
protected function renderTable($table)
{
if (is_array($table)) {
$array = $table;
if (self::shouldWrapArrayBeforeRendering($array, $wrapSingleValues = true)) {
$array = array($array);
}
foreach ($array as $key => $tab) {
if ($tab instanceof DataTable\Map
|| $tab instanceof DataTable
|| $tab instanceof DataTable\Simple) {
$array[$key] = $this->convertDataTableToArray($tab);
if (!is_array($array[$key])) {
$array[$key] = array('value' => $array[$key]);
}
}
}
} else {
$array = $this->convertDataTableToArray($table);
}
if (!is_array($array)) {
$array = array('value' => $array);
}
// decode all entities
$callback = function (&$value, $key) {
if (is_string($value)) {
$value = html_entity_decode($value, ENT_QUOTES, "UTF-8");
};
};
array_walk_recursive($array, $callback);
$str = json_encode($array);
return $this->jsonpWrap($str);
}
/**
* @param $str
* @return string
*/
protected function jsonpWrap($str)
{
if (($jsonCallback = Common::getRequestVar('callback', false)) === false)
$jsonCallback = Common::getRequestVar('jsoncallback', false);
if ($jsonCallback !== false) {
if (preg_match('/^[0-9a-zA-Z_.]*$/D', $jsonCallback) > 0) {
$str = $jsonCallback . "(" . $str . ")";
}
}
return $str;
}
/**
* Sends the http header for json file
*/
protected function renderHeader()
{
self::sendHeaderJSON();
ProxyHttp::overrideCacheControlHeaders();
}
public static function sendHeaderJSON()
{
@header('Content-Type: application/json; charset=utf-8');
}
private function convertDataTableToArray($table)
{
$renderer = new Php();
$renderer->setTable($table);
$renderer->setRenderSubTables($this->isRenderSubtables());
$renderer->setSerialize(false);
$renderer->setHideIdSubDatableFromResponse($this->hideIdSubDatatable);
$array = $renderer->flatRender();
return $array;
}
}
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